"Impossible Motion: Magnet-like Slopes" won the 6th Annual Best Visual Illusion of the Year competition, held in Florida a few days ago. And, much like yesterday's street paintings, it will make your brain hurt.

No, this objet d'trickery created by Koukichi Sugihara of Japan's Meiji Institute for Advanced Study of Mathematical Sciences isn't magic — infernal, infernal magic — nor is it computer generated. But it did win first prize. To see the rest of the top ten finalists, head over here — and pay special attention to the "monkey business illusion."